BIOS Update

NameOperating SystemVersionReleasedDownload
BIOS update
Windows Vista 64bit,
Windows 7 64bit
3508 Jul 2010 Download
BIOS Update
22CN35WW V2.02.txt
Windows Vista 32bit,
Windows XP,
Windows 7 32bit
3508 Jul 2010 Download

Important information

Lenovo strongly suggests rebooting the system before applying the BIOS update.

Fixes and enhancements

Latest BIOS Version fixed all issues from previous ones.

Change history


Disabled Low Battery Alarm function.


1 Fixed XP mode CPU usage too high

2 Supports U450 U450P module


Updated ATI VBIOS to BR34503.001.

Installation instructions

Take WinPhlash32 (202).exe as example,

1. Restart computer.

2. Locate the file WinPhlash32 (202).exe that has been downloaded.

3. Double click the WinPhlash32 (202).exe. For Vista and Windows 7, you may run it as administrator by left-clicking on the icon and selecting "Run as administrator".

4. Click Install.

5. Click Flash BIOS.

6. Press Enter to start flashing. During the process, you are advised not to turn off the computer.

7. When the update finishes, the computer will automatically reboot for the changes to take effect.

8. Enter to BIOS menu, load default setting-> save and exit.

9. Please reboot the system again.